set term png font "./simsun.ttc, 9"
set output 'province_num.png'

set title "访问服务器的全国各省IP分布"
#set xlabel '省（自治区、直辖市）'
set ylabel '百分比'
set style data histogram
set style histogram cluster gap 1
set style fill solid border -1
unset key
set xtics nomirror rotate by -90
set grid ytics
plot 'prov_num.dat' using ($1*100):xtic(2)
